在android开发中，TItleBar 应该算是使用频率最高的控件之一了，虽然google也给开发者们提供了好用的ToolBar，但是鉴于目前国内一切向ios看齐的android开发环境，我们拿到的设计稿往往都是按照ios风格来设计的，当然一般公司的设计师不可能给android和ios各设计一套UI，所以...希望国内的android环境越来越好吧...
之前也在到处找过别人实现好的Titlebar控件，但是没有发现很合适的，那么就自己来造一个轮子吧！
一般项目所需要的Titlebar总结起来有以下这么几种：
- 返回键、title、右侧菜单
- 返回键、搜索框、右侧菜单
- “返回”字样(带图标或者不带图标)、title或者搜索框、图标菜单或者文字“菜单”
- 图标和文字的大小、颜色、padding值、排版等等
接下来我们就来自定义一个满足上述需求的通用Titlebar.
1.定义titlebar的布局
采用权重的方式，合理分配屏幕空间，为了满足需求多样化而使用多个控件，控制显隐状态。
2.自定义样式列表
自定义一些必要的可扩展属性
3.CommonTitleBar自定义ViewGroup的实现
3.1 自定义属性
//代码片段
public CommonTitleBar(Context context)
{
this(context, null, 0);
}
public CommonTitleBar(Context context, AttributeSet attrs)
{
this(context, attrs, 0);
}
public CommonTitleBar(Context context, AttributeSet attrs, int defStyleAttr)
{
super(context, attrs, defStyleAttr);
this.context = context;
TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.common_title_bar);
titleBarHeight = typedArray.getDimension(R.styleable.common_title_bar_title_bar_height, dip2px(context, DEFAULT_TITLE_BAR_HEIGHT));
titleBarBackground = typedArray.getColor(R.styleable.common_title_bar_title_bar_background, ContextCompat.getColor(context, android.R.color.white));
leftViewVisibility = typedArray.getBoolean(R.styleable.common_title_bar_left_view_visibility, true);
leftTextViewVisibility = typedArray.getBoolean(R.styleable.common_title_bar_left_textView_visibility, false);
leftImageViewVisibility = typedArray.getBoolean(R.styleable.common_title_bar_left_imageView_visibility, true);
leftViewBackground = typedArray.getColor(R.styleable.common_title_bar_left_view_background, getTitleBarBackground());
leftText = typedArray.getString(R.styleable.common_title_bar_left_text);
leftTextViewDrawable = typedArray.getResourceId(R.styleable.common_title_bar_left_textView_drawable, 0);
leftTextSize = typedArray.getDimension(R.styleable.common_title_bar_left_text_size, dip2px(context,16));
leftTextColor = typedArray.getColor(R.styleable.common_title_bar_left_text_color, ContextCompat.getColor(context, android.R.color.black));
leftTextViewBackground = typedArray.getColor(R.styleable.common_title_bar_left_textView_background, getTitleBarBackground());
leftImageDrawable = typedArray.getResourceId(R.styleable.common_title_bar_left_image, R.drawable.ic_back);
rightViewBackground = typedArray.getColor(R.styleable.common_title_bar_right_view_background, getTitleBarBackground());
rightViewVisibility = typedArray.getBoolean(R.styleable.common_title_bar_right_view_visibility, true);
rightTextViewVisibility = typedArray.getBoolean(R.styleable.common_title_bar_right_textView_visibility, false);
rightImageViewVisibility = typedArray.getBoolean(R.styleable.common_title_bar_right_imageView_visibility, false);
rightText = typedArray.getString(R.styleable.common_title_bar_right_text);
rightTextSize = typedArray.getDimension(R.styleable.common_title_bar_right_text_size, dip2px(context,16));
rightTextColor = typedArray.getColor(R.styleable.common_title_bar_right_text_color, ContextCompat.getColor(context, android.R.color.black));
rightTextViewBackground = typedArray.getColor(R.styleable.common_title_bar_right_textView_background, getTitleBarBackground());
rightImageDrawable = typedArray.getResourceId(R.styleable.common_title_bar_right_image, R.drawable.ic_menu);
middleViewBackground = typedArray.getColor(R.styleable.common_title_bar_middle_view_background, getTitleBarBackground());
titleTextViewVisibility = typedArray.getBoolean(R.styleable.common_title_bar_title_visibility, true);
searchVisibility = typedArray.getBoolean(R.styleable.common_title_bar_search_visibility, false);
titleText = typedArray.getString(R.styleable.common_title_bar_title_text);
titleTextSize = typedArray.getDimension(R.styleable.common_title_bar_title_text_size, dip2px(context,20));
titleTextColor = typedArray.getColor(R.styleable.common_title_bar_title_text_color, ContextCompat.getColor(context, android.R.color.black));
titleTextViewBackground = typedArray.getColor(R.styleable.common_title_bar_title_text_color, ContextCompat.getColor(context, android.R.color.black));
searchHint = typedArray.getString(R.styleable.common_title_bar_title_search_hint);
searchHintColor = typedArray.getColor(R.styleable.common_title_bar_title_search_hint_color, ContextCompat.getColor(context, android.R.color.darker_gray));
titleSearchText = typedArray.getString(R.styleable.common_title_bar_title_search_text);
etSearchPaddingLeft = typedArray.getDimension(R.styleable.common_title_bar_title_search_paddingLeft, 10);
etSearchPaddingTop = typedArray.getDimension(R.styleable.common_title_bar_title_search_paddingTop, 0);
etSearchPaddingRight = typedArray.getDimension(R.styleable.common_title_bar_title_search_paddingRight, 10);
etSearchPaddingBottom = typedArray.getDimension(R.styleable.common_title_bar_title_search_paddingBottom, 0);
etDrawableLeft = typedArray.getResourceId(R.styleable.common_title_bar_title_search_drawableLeft, 0);
etDrawableRight = typedArray.getResourceId(R.styleable.common_title_bar_title_search_drawableRight, 0);
titleSearchTextColor = typedArray.getColor(R.styleable.common_title_bar_title_search_text_color, ContextCompat.getColor(context, android.R.color.black));
titleSearchTextSize = typedArray.getDimension(R.styleable.common_title_bar_title_search_text_size, dip2px(context,16));
titleSearchBackground = typedArray.getResourceId(R.styleable.common_title_bar_title_search_background, R.drawable.bg_title_search);
titleSearchTextGravity = typedArray.getInt(R.styleable.common_title_bar_title_search_text_gravity, 19);
typedArray.recycle();
initView();
}
3.2 高度的测量和设置
//代码片段
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
int width = MeasureSpec.getSize(widthMeasureSpec);
//title高度的测量和设置
setMeasuredDimension(width, (int) titleBarHeight);
}
private int dip2px(Context context, float dpValue)
{
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (dpValue * scale + 0.5f);
}
4.最终效果
可以自己通过api进行高度定制，也可以几行代码简单满足一般需求。
高度定制
一般使用
项目地址
此项目还在不断改进更新中，欢迎提出宝贵意见：）